Books and movies can be different in many ways. Especially when the book is read first and then watching the movie to that book. Things like lighting, characters, and places can be quite different in the movie then what someone might have imagined. Sometimes directors add new things or take things out to make the movie more interesting or enjoyable for the viewers. In The Hobbit they added a few new things just like any other movie might do, and they changed things slightly or made it easier to understand